Thank you! I am very glad to hear you like them!
I have indeed been playing around with the idea of painting details onto the atlas, but it's outside my capacity atm and without any information about the specific kind of details and the style, it's a bit risky to invest time here.
However, everyone is free to edit the atlas themselves - just open it in an editing software and paint onto an extra layer. I was thinking about making a video for it eventually.
For the future, I am planning to offer more realistic-looking packs as well.
In any case, people can always book my time to work on very specific, custom assets that fit into their project seamlessly :)